Created attachment 157415 [details] Screenshot Screenshot is in attachment. Fedora KDE, 5.27.3, 5.104.
Cannot reproduce. Are you using any margin separator before the shutdown button?
(In reply to Fushan Wen from comment #1) > Cannot reproduce. Are you using any margin separator before the shutdown > button? I don't use separators. It scales correctly starting in 36 size, 200% HiDPI. But if you make panel bigger, then it does not scales correctly again. And the next step when it scaled correctly is 46. Screenshots below.
Created attachment 157417 [details] 36 Screenshot
Created attachment 157418 [details] 34 Screenshot
Can confirm.
*** Bug 468475 has been marked as a duplicate of this bug. ***
Since my bug was closed as a dupe of this, let me add an important addendum. The sizing issues not only affect the visible size of the icon, they also affect the click target size of the widget. In some cases, the click target will not include the top (or bottom?) edge of the widget, leading to failed clicks. Importantly, the issues *do not* coincide. For instance: * panel width 26: tiny icon, full size click target * panel width 27: full size icon, small click target (!) * panel width 28: full size icon, full size click target I actually was not able to find a case (with brief testing) where a setting yielded both a tiny icon and a small click target. This is surprising, but I assume the issues are probably still related anyway. (If not, please reopen https://bugs.kde.org/show_bug.cgi?id=468475).
*** This bug has been marked as a duplicate of bug 474083 ***